


        .about_lb{
            width: 100%;
            position: relative;
            height: 100vh;
            overflow: hidden;
        }
        .about_lb .swiper-container{
            height: 100%;
        }
        .about_lb .about_tit_box{
            position: absolute;
            width: 1050px;
            z-index: 3;
            margin-top: -106px;
        }
        .about_lb .about_tit_box img{
            display: block;
            width: 100%;
            height: auto;
        }
        .about_lb .about_tit_box p{
            font-size: 78px;
            color: #fff;
            letter-spacing: 6px;
        }
        .about_lb .about_nav_left{
            position: absolute;
            left: 20px;
            width: 40px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 4;
            cursor: pointer;
        }
        .about_lb .about_nav_right{
            position: absolute;
            right: 20px;
            width: 40px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 4;
            cursor: pointer;
        }
        .about_lb .swiper-containernnnnnnn_about1{
            width:100%;
            height: 100%;
            overflow: hidden;
        } 
        .about_lb .swiper-container_about1 .swiper-slide{
            width: 100%;
            height: auto;
            overflow: hidden;
        }
       
        .about_pt1{
            width: calc(100% - 120px);
            margin-left: 60px;
            background-color: #fff;
            padding: 75px 100px;
            margin-top: -120px;
            position: relative;
            z-index: 4;
        }
        .about_pt1 .ppt_tit .line{
            width: 175px;
            height: 2px;
            background-color: #1079b2;
            margin: 25px auto 10px;
        }
        .about_pt1 .p_box{
            margin-top: 40px;
        }
        
        .about_pt1 .p_box p{
            line-height: 160%;
            text-indent: 40px;
            color: #8c8c8c;
            font-size: 20px;
            letter-spacing: 1px;
        }
        .about_pt1 .p_box p span{
            color: #666666;
            font-weight: 700;
        }

        .tips{
            padding-top: 77px;
            padding-bottom: 80px;
            max-width: 1410px;
            margin: 0px auto;
            text-align: center;
            margin-top: 20px;
            overflow: hidden;
        }
        .tips .list .item{
            width: 360px;
            height: 360px;
            display: inline-block;
            vertical-align: top;
            position: relative;
            z-index: 2;
            margin-left: 54px;
        }
        .tips .list .item:first-child{
            margin-left: 0px;
        }
        .tips .list .item:last-child{
            display: block;
            margin: 0 auto;
        }
        .tips .list .item:nth-child(2){
            z-index: 3;
        }
        .tips .border{
            transform: rotate(45deg);
            background: #f5f5f5;
        }
        .tips .border i{
            position: absolute;
            background: #e4e4e5;
            transition: all .35s;
        }
        .tips .border .hor{
            height: 13px;
            width: 0px;
        }
        .tips .border .ver{
            width: 13px;
            height: 0px;
        }
        .tips .border .tp,
        .tips .border .tp + *{
            top: 0px;
        }
        .tips .border .rht,
        .tips .border .rht + *{
            right: 0px;
        }
        .tips .border .btm,
        .tips .border .btm + *{
            bottom: 0px;
        }
        .tips .border .btm,
        .tips .border .btm + *{
            bottom: 0px;
        }
        .tips .border .lft,
        .tips .border .tp{
            left: 0px;
        }
        .tips .border .tp{
            transition-delay: .35s;
        }
        .tips .border .rht{
            transition-delay: .7s;
        }
        .tips .border .btm{
            transition-delay: 1.05s;
        }
        .tips .border .lft{
            transition-delay: 1.4s;
        }
        .tips .list .item.frozen .hor,
        .tips .list .item.frozen + .item .border .hor{
            width: 100%;
        }
        .tips .list .item.frozen .ver,
        .tips .list .item.frozen + .item .border .ver{
            height: 100%;
        }
        .tips .list .item .txt{
            width: 260px;
            font-size: 16px;
            line-height: 1.5;
            color: #333;
            margin-top: 30px;
            opacity: 0;
            transition: margin .8s, opacity .8s;
            transition-delay: 1.2s;
            z-index: 2;
        }
        .tips .list .item.frozen .txt,
        .tips .list .item.frozen + .item .txt{
            margin-top: 0px;
            opacity: 1;
        }
        .tips .list .item .txt .topic{
            font-size: 25px;
            margin-bottom: 35px;
            color: #000;
            font-weight: bold;
            line-height: 1;
        }
        .tips .list .item .block{
            width: 38px;
            height: 38px;
            border: 13px solid #e4e4e5;
            box-sizing: content-box;
            position: absolute;
            z-index: 2;
            pointer-events: none;
        }
        .tips .list .item .block::before,
        .tips .list .item .block::after{
            content: '';
            position: absolute;
            width: 13px;
            height: 13px;
            background: #f5f5f5;
            z-index: 2;
        }
        .tips .list .item .block::before{
            top: 0px;
            left: 0px;
            transform: translate(-100%,-100%);
        }
        .tips .list .item .block::after{
            bottom: 0px;
            right: 0px;
            transform: translate(100%,100%);
        }
        .tips .list .item .block.btmLft{
            left: 0px;
            bottom: 0px;
        }
        .tips .swiper{
            position: relative;
            width: 488px;
            height: 488px;
            left: 50%;
            margin-left: -244px;
        }
        .tips .swiper .tipSwiper{
            height: 100%;
        }
        .tips .swiper .tipSwiper .swiper-slide{
            height: 100%;
        }
        .tips .swiper .tipSwiper .inner{
            position: absolute;
            width: 300px;
            height: 300px;
            left: 50%;
            top: 64px;
            transform: translateX(-50%);
        }
        .tips .swiper .tipSwiper .inner .border .hor{
            height: 10px;
        }
        .tips .swiper .tipSwiper .inner .border .ver{
            width: 10px;
        }
        .tips .swiper.frozen .tipSwiper .inner .border .hor{
            width: 100%;
        }
        .tips .swiper.frozen .tipSwiper .inner .border .ver{
            height: 100%;
        }
        .tips .swiper .tipSwiper .inner .txt{
            flex-direction: column;
            top: 38px;
            left: 38px;
            bottom: 38px;
            right: 38px;
            position: absolute;
            margin: auto;
            z-index: 2;
            font-size: 12px;
            transform: initial;
        }
        .tips .swiper .tipSwiper .inner .txt .topic{
            font-size: 20px;
            margin-bottom: 28px;
            color: #000;
            font-weight: bold;
            line-height: 1;
        }
        .tips .swiper .btn{
            width: 50px;
            height: 50px;
            position: absolute;
            z-index: 2;
            cursor: pointer;
            top: calc(300px * 1.414213 / 2);
            transform: translateY(-50%);
        }
        .tips .swiper .prev{
            background: url(./../images/btns.png) 0 -100px;
            left: 54px;
        }
        .tips .swiper .next{
            background: url(./../images/btns.png) 0 0px;
            right: 54px;
        }
        


        .ppt3{
            position: relative;
            width: 100%;
            padding: 100px 40px;
        }
        .ppt3 .ppt_tit .line{
            background-color: rgba(0,0,0,0);
        }
        .ppt3_main{
            padding-right: 180px;
            position: relative;
            margin-top: 80px;
        }
        .ppt3_main_left{
            position: relative;
        }
        .ppt3_main .list{
            position: relative;
            display: none; 
            
        }
        .ppt3_main .list.active{
            display: block; 
        }
        .ppt3_main .list .img_box{
            width: 510px;
            position: relative;
        }
        .ppt3_main .list .img_box .pic{
            padding-bottom: 100%;
            position: relative;
        }
        .ppt3_main .list .img_box .pic img{
            position: absolute;
            top: 0px;
            left: 0px;
        }
        .ppt3_main_left .tip{
            position: absolute;
            width: 95px;
            height: 50px;
            padding-top: 5px;
            clip-path: polygon(0% 0%,100% 0%,50% 100%);
            background: #1079b2;
            color: #fff;
            font-size: 14px;
            left: 510px;
            top: 50px;
            text-align: center;
            z-index: 2;
            transform: translateX(-50%);
        }
        .ppt3_main .list_center{
            position: absolute;
            width: calc(100% - 50px);
            top: 50px;
            right: 0px;
            height: calc(100% - 100px);
            padding-left: 320px;
        }
        .ppt3_main .list_center::before{
            content: '';
            position: absolute;
            width: 450px;
            height: 100%;
            top: 0px;
            left: 0px;
            border: 1px solid #fff;
            box-sizing: border-box;
            border-right-width: 0px;
        }
        .ppt3_main .biaoge{
            width: 100%;
            height: 100%;
            font-size: 20px;
            padding: 20px;
            background-color: #fff;
            box-shadow: 4px 4px 12px -2px rgba(0,0,0,0.25);
            position: relative;
            overflow: hidden;
        }
        
        .ppt3_main .biaoge .div{
            width: 100%;
        }
        .ppt3_main .biaoge p{
            margin: 15px 0;
            color: #000;
        
        }
        .ppt3_main .biaoge .p1{
            color: #999999;
            margin-bottom: 10px;
        }
        .ppt3_main .biaoge p span{
            display: block;
            width: calc(100% / 3);
            float: left;
            text-align: center;
        }
        .ppt3_main .ppt3_main_nav{
            position: absolute;
            top: 0;
            right: 0;
            height: 100%;
            display: -webkit-box;
            display: -moz-box;
            display: -webkit-flex;
            display: -moz-flex;
            display: -ms-flexbox;
            display: flex;
            -webkit-box-pack: center;
            -ms-flex-pack: center;
            -webkit-justify-content: center;
            justify-content: center;
            -webkit-box-align: center;
            -ms-flex-align: center;
            -webkit-align-items: center;
            align-items: center;
        
        }

        .ppt3_main .ppt3_main_nav .div{
            width: 100%;
        }
        .ppt3_main_nav .nav_index{
            width: 120px;
            height: 120px;
            line-height: 120px;
            text-align: center;
            letter-spacing: 2px;
            color: #000;
            font-size: 24px;
            background: url(../images/nav_index_bg1.png) no-repeat center center;
            background-size: 100% 100%;
            cursor: pointer;
        }
        .ppt3_main_nav .nav_index.active,.ppt3_main_nav .nav_index:hover{
            background: url(../images/nav_index_bg2.png) no-repeat center center;
            background-size: 100% 100%;
            color: #fff;
        }
        


        
        
        @media(max-width:1600px){
            .ppt3_main .ppt3_main_nav{
                position: absolute;
                top: 0;
                right: 0;
                height: 100%;
                display: -webkit-box;
                display: -moz-box;
                display: -webkit-flex;
                display: -moz-flex;
                display: -ms-flexbox;
                display: flex;
                -webkit-box-pack: center;
                -ms-flex-pack: center;
                -webkit-justify-content: center;
                justify-content: center;
                -webkit-box-align: center;
                -ms-flex-align: center;
                -webkit-align-items: center;
                align-items: center;
            
            }
            .ppt3_main .ppt3_main_nav .div{
                width: 100%;
            }
            .ppt3_main_nav .nav_index{
                width: 120px;
                height: 120px;
                line-height: 120px;
                text-align: center;
                letter-spacing: 2px;
                color: #000;
                font-size: 24px;
                background: url(../images/nav_index_bg1.png) no-repeat center center;
                background-size: 100% 100%;
                cursor: pointer;
            }
            .ppt3_main_nav .nav_index.active,.ppt3_main_nav .nav_index:hover{
                background: url(../images/nav_index_bg2.png) no-repeat center center;
                background-size: 100% 100%;
                color: #fff;
            }
    
    
            .ppt3_main .list_center{
                padding-left: 300px;
            }
            .ppt3_main .list_center::before{
                width: 300px;
            }
            
            .ppt3_main_nav .nav_index{
                width: 100px;
                height: 100px;
                line-height: 100px;
                font-size: 20px;
            }
            .ppt3_main{
                padding-right: 160px;
            }

            .about_lb .about_tit_box p{
                font-size: 68px;
            }
        }
        @media(max-width:1200px){
            .ppt3_main .biaoge{
                font-size: 18px;
            }
            .ppt3_main .list_center{
                padding-left: 260px;
            }
            .ppt3_main .list_center::before{
                width: 260px;
            }

            .about_lb .about_tit_box{
                width: 90%;
            }
            .about_lb .about_tit_box p{
                font-size: 56px;
            }

            .tips{
                padding-top: 68px;
                padding-bottom: 90px;
            }
            .tips .list .item{
                width: 348px;
                height: 348px;
            }
            .tips .list .item .block{
                width: 34px;
                height: 34px;
            }
            .tips .list .item .txt{
                font-size: 14px;
                width: 245px;
            }
            .tips .list .item .txt .topic{
                font-size: 22px;
            }
        }
        @media(max-width:1024px){
            .ppt3_main_nav .nav_index{
                width: 90px;
                height: 90px;
                line-height: 90px;
                font-size: 18px;
            }
            .ppt3_main{
                padding-right: 150px;
            }
            .ppt3_main .list_center{
                padding-left: 240px;
            }

            .about_lb .about_tit_box p{
                font-size: 50px;
            }

            .about_pt1{
                padding: 50px 80px;
            }
            .about_pt1 .p_box p{
                font-size: 18px;
            }
            .about_pt1 .ppt_tit .line{
                width: 130px;
                margin-top: 15px;
                margin-bottom: 5px;
            }

            .tips .list .item{
                width: 324px;
                height: 324px;
            }
            .tips .list .item .block{
                width: 32px;
                height: 32px;
            }
            .tips .list .item .txt{
                font-size: 13px;
                width: 240px;
            }
            .tips .list .item .txt .topic{
                margin-bottom: 30px;
                font-size: 21px;
            }
            .tips .list .item .border .hor{
                height: 11px;
            }
            .tips .list .item .border .ver{
                width: 11px;
            }
            .tips .list .item .block{
                border-width: 11px;
            }
            .tips .list .item .block::before,
            .tips .list .item .block::after{
                width: 11px;
                height: 11px;
            }
        }
        
        @media(max-width:980px){
            .ppt3{
                padding: 20px 10px;
            }
        
            .ppt3_main .list_center{
                padding-left: 0px;
            }
            .ppt3_main .biaoge{
                background: rgba(255,255,255,.95);
            }
        }
        @media(min-width:768px){
            .tips .swiper{
                display: none;
            }
        }
        @media(max-width:767px){
            .ppt3_main{
                padding-right: 0px;
                margin-top: 50px;
            }
            .ppt3_main .list .img_box{
                width: 100%;
            }
            .ppt3_main .list .img_box .pic{
                padding-bottom: 400px;
            }
            .ppt3_main .list_center{
                position: initial;
                margin-left: 25px;
                margin-top: -25px;
            }
            .ppt3_main .ppt3_main_nav{
                z-index: 2;
                height: 400px;
                right: 20px;
            }
            .ppt3_main_nav .nav_index{
                width: 55px;
                height: 55px;
                line-height: 55px;
                font-size: 14px;
            }
            .ppt3_main_left .tip{
                top: 400px;
                transform: initial;
                width: 80px;
                height: 40px;
                left: 50px;
                margin-top: -25px;
            }
            .ppt3_main .biaoge{
                font-size: 14px;
                padding: 15px;
                padding-top: 50px;
            }
            .ppt3_main .biaoge p{
                margin: 10px 0px;
            }
            .ppt3_main .list_center::before{
                display: none;
            }

            .about_pt1{
                width: calc(100% - 20px);
                margin-left: 10px;
                padding: 30px 20px;
            }
            .about_lb .about_tit_box p{
                font-size: 36px;
                letter-spacing: 4px;
            }
            .about_pt1 .p_box p{
                font-size: 16px;
            }
            .about_pt1 .p_box p + p{
                margin-top: 15px;
            }

            .tips{
                padding-top: 40px;
                padding-bottom: 10px;
            }
            .tips .list{
                display: none;
            }
            .tips .list .item{
                width: 300px;
                height: 300px;
                display: block;
                margin: 0 auto !important;
                z-index: 2 !important;
            }
            .tips .list .item .block{
                display: none;
            }
            .tips .list .item .txt{
                font-size: 12px;
            }
            .tips .list .item .txt .topic{
                font-size: 20px;
                margin-bottom: 28px;
            }
        }
        